i plan to hav a box about 15x20 cm for 1 plant. 35 cm tall. 1 plant shud fit in there. my question is will 1 cfl be enuff? its 1600 lumens,23 watt and 15x20(if my math is correct30cm=1 foot. 15cm=0.5 foot.20 cm=0.666 foot. 0.5x0.666=0.333 square foot) is 0.3 square foot. i read on this forum 1 square foot of grow space needs about 3000 lumens so i wud need around 1000. i got 1600 so shudnt 1 cfl be enuff? ppl told me 1 isnt enuff. ok i can put 2 which shud be like over the needed amount. will it be alright? help a newby